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Revere police confirmed Saturday that the family had moved from the Hampton Inn on Route 1A, but could provide no further information.

The FBI declined to comment on the move on Saturday, citing security concerns and the ongoing trial.

Tsarnaev's family had been staying at the Revere hotel since the six relatives had arrived in Boston on Thursday. The group did not include Tsarnaev's parents.

The presence of any Tsarnaev family members in the courtroom for the defense case could help counter the perception put forward by the prosecution that the sole surviving Marathon bomber is callous and unrepentant. In a video released earlier this week, Tsarnaev is seen giving the middle finger to a security camera inside his cell.

NewsCenter 5 legal analyst and former Attorney General Martha Coakley said having Tsarnaev's family members in court can help the defense humanize him and perhaps convince the jury to spare his life.

"They have to get at least one juror to feel sympathy for him," Coakley said.

But some survivors hope jurors will neither feel sympathy nor show mercy. Adrienne Haslet-Davis, an amputee, testified earlier this week, and spoke to Anderson Cooper, explaining her support of the death penalty.

"I do feel strongly the death penalty for this case and for, I believe there's a justice system for a reason, and I support the prosecutions', you know, going after that. I'm going to be really upset if he doesn't get the death penalty," she said.

If Tsarnaev's family members do testify, their trip would be paid for by the defense, which is ultimately funded by taxpayers.

The prosecution rested Thursday afternoon after calling a man who lost a leg in the bombing. It will get a chance for rebuttal after the defense presents its case.

Tsarnaev was convicted earlier this month of all 30 charges against him. Three people were killed and more than 260 others were wounded when twin bombs exploded at the 2013 marathon.

A jury must decide whether to sentence him to life in prison or to death.